1Section 61150077L1-5, Issue 161150.077L1-5B
CONTENTS
1. GENERAL ......................................................................1
2. INSTALLATION .............................................................2
3. TESTING........................................................................4
4. SPECIFICATIONS .........................................................5
5. MAINTENANCE.............................................................5
6. WARRANTY AND CUSTOMER SERVICE ...................5
Figures
Figure 1. BR1/10 U-BR1TE................................................1
Figure 2. BR1/10 LIU and BCU..........................................2
Tables
Table A. BR1/10 BCU LED Error Information for
U-BR1TE ............................................................2
Table B. BR1/10 BCU Indicators ......................................2
Table C. BR1/10 U-BR1TE Connector Interface..............3
Table D. Switch Functions ................................................3
Table E. BR1/10 U-BR1TE Specifications ........................6
1. GENERAL
This practice provides installation and maintenance
procedures for the ADTRAN® BR1/10 U-BR1TE. Figure 1
is an illustration of the BR1/10 U-BR1TE.
Revision History
Revision to this practice adds a Specification Table,
incorporates a new CLEI Code, changes Figure 2, and
corrects typographical errors.
Features
BR1/10 U-BR1TE, part number 1150077L1, features
include:
• Features an ISDN 2B1Q interface that meets all
Layer 1 requirements as specified in ANSI T1.601-
1992.
• Provides 18 kft nominal range on mixed gauge wire.
• Operates in 3 DS0 format according to TR-NWT-
000397.
• Supports ADTRAN 4:1 Time Division Multiplexer
(TDM) format.
• Features performance monitoring of the Layer 1
facilities as specified in TR-NWT-000397 and TR-
TSY-000829.
• Provides a distinctive metallic DC test signature, as
specified in TR-NWT-000397, to identify the unit
as either a line unit LT or line unit NT.
Section 61150.077L1-5B
Issue 1, March 1997
CLEI Code # D4CIA2T2_ _
BR1/10 U-BR1TE
ISDN 2B1Q INTERFACE
INSTALLATION AND MAINTENANCE
PRACTICES
Figure 1. BR1/10 U-BR1TE
Trademarks: Any brand names and product names included in this document are trademarks, registered trademarks, or trade names
of their respective holders.
1 2 3 4 5 6 7
ON
UBRITE
1150077L1
STATUS
S1
STATUS
LED
• Responds to B1, B2 and 2B+D loopbacks through
the embedded operations channel (
eoc
).
• Operates with BR1/10 LIU and BCU to provide local
access to test each channel unit.
General Description
The BR 1/10 U-BR1TE is a line card that plugs into a single
channel slot of an ADTRAN BR1/10, and provides the
interface between the Digital Subscriber Line (DSL) to the
customer’s location and the T1 carrier facility.
The BR1/10 and BR 1/10 U-BR1TE have been designed
to provide a maximum concentration for 2B+D Basic Rate
ISDN (BRI). The BR1/10 and BR 1/10 U-BR1TE are used
in both central office terminal (COT) and a remote terminal
(RT) applications. The BR1/10 Channel Bank will
interoperate with other channel bank systems that are
WECO®D4 compatible, such as SLC-96 and SLC-5
systems.
The BR1/10 and BR 1/10 U-BR1TE operate in the TR-
NWT-000397 3-DS0 mode allowing up to eight individual
BR1TE cards for each T1 carrier facility. In the 8 DSL mode
the BR1/10 is compatible with channel bank systems
equipped with TR-NWT-000397 compliant ISDN channel
unit, such as the ADTRAN D4 U-BR1TE II, and the
ADTRAN SLC-5 U-BR1TE.
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
2 Section 61150077L1-5, Issue 1 61150.077L1-5B
Table A. BR1/10 BCU LED
Error Information for U-BR1TE
Figure 2. BR1/10 LIU and BCU
Table B. BR1/10 BCU Indicators
INDICATOR PROBLEM FAULTLED
CR SYNC RED Framing across T1 carrier is
not achieved to another ISDN
network element.
Associate channel unit
not installed at remote
channel banks
or
T1 carrier facility problem
LP SYNC RED Synchronization not achieved
on the 2-wire U-interface.
Appropriate upstream or
downstream ISDN
Network Element not
installed (NT1, U-
Repeater, Tandem U-
BR1TE, or ISDN switch)
or
DSL problem
CR CRC RED or
FLASHING
A Near End Block Error
(NEBE) has been received
from the T1 carrier facility.
Mismatch of ZBS option
on associated BR1TE unit
or
Timing error on T1 carrier
facility
LP CRC RED or
FLASHING
A Near End Block Error
(NEBE) has been received
from the 2-wire U-interface.
Noise problems on DSL or
other ISDN network
element.
LP SYNC:
LED DESCRIPTION
LP CRC:
CR SYNC:
CR CRC:
DS0-LB:
ACT:
U-INTERFACE SYNCHRONIZATION STATUS
U-INTERFACE CYCLIC REDUNDANCY CHECK
(
CRC
) ERRORS
APPROPRIATE T1 INTERFACE FRAMING
STATUS
T1 INTERFACE
CRC
ERRORS
ON
INDICATES U-BR1TE IS IN A 2B+D
CONFIGURATION. ONE
FLASH
PER
SECOND FOR A B1 LOOPBACK; TWICE PER
SECOND FOR A 32 LOOPBACK.
EXCHANGE OF THE ACTIVATION BIT
BETWEEN THE CUSTOMER'S TERMINAL
EQUIPMENT, AND THE ISDN SWITCH.
5
4
3
2
1
9
8
7
6
ADR3
ADR2
AD
R1
NT1
LPTX
LPBX
AD
R6
AD
R5
ADR4
10
CRTX
T
E
S
T
IN
M
O
N
OUT
LIU
1150079L1
ON
1 2 3 4 5 6 7 8 9 10
BCU
1 2 3 4
TEST
AY
TP
ESF
B8ZS
10DSL
EXT
LOOP
DS1-LOC
LP-SYNC
CR-SYNC
DSO-LB
AR
RCV
SF
AMI
BDSL
LOC
CAU
RMT
CRC
CRC
ACT
LB ON
REMOTE
DS0
B2
OFF
LOC
DS1
B1
1150080L1
Channel Selection
Loopback Address
DB-9 Connector
BCU DIP Test Switch
Recessed Test Push Button
When deployed with another BR1/10 using the ADTRAN
proprietary D-channel 4:1
TDM, up to ten BR1 2B+D
circuits can be delivered,
providing optimized utilization
of the T1 carrier facilities.
Options for the functions
specific to the BR1/10 U-
BR1TE are selected with the
seven-position Dual In-line
Package (DIP) switch on the
U-BR1TE. The STATUS
LED provides status
synchronization information for
the local craftpersons.
2. INSTALLATION
After unpacking the unit,
immediately inspect it for
possible shipping damage. If
damage is discovered, file a
claim immediately with the
carrier, then contact ADTRAN
Customer Service (see section 6,
Warranty
and Customer Service
).
The BR1/10 U-BR1TE plugs directly into any
of the BR1/10 chassis channel positions
labeled 1 through 10. To install the U-BR1TE,
grasp the unit by the faceplate and insert it
into the backplane connector until firmly
seated. At this point, the STATUS LED on the
U-BR1TE should illuminate RED. A RED
STATUS LED indicates that synchronization
has not been achieved for either the ISDN
U-Interface or the T1 interface. Once
synchronization is achieved on both interfaces,
the STATUS LED will change to GREEN. If
the STATUS LED remains RED, check the
BCU indicators to determine the error type. A quick
summary of error information is provided in Table A. For
more information, see the BCU Installation and
Maintenance Practice number 61150.080L1-5A.
The BR1/10 BCU provides additional STATUS
information regarding the individual U-BR1TEs. To
access this information, select an individual U-BR1TE
unit using the selection dial labeled 1-10 on the LIU.
Once an individual U-BR1TE is selected, the status can be
checked using the indicators on the BCU; the LIU and BCU
are illustrated in Figure 2 and explained in Table B.
Following power-up, the BR1/10 U-BR1TE, the LP and CR
SYNC LEDs on the BR1/10 BCU will be
ON
(Red) until
synchronization is achieved across the T1 facility and the
ISDN interface. Upon synchronization with the carrier and
loop interface, the LEDs turn
OFF
and remain off.
3Section 61150077L1-5, Issue 161150.077L1-5B
Table C. BR1/10 U-BR1TE
Connector Interface
Table D. Switch Functions
Channel
Position Pin Lead
1
2
3
4
5
6
7
8
9
10
27
2
29
4
31
6
33
8
35
10
37
12
39
14
41
16
43
18
45
20
R
T
R
T
R
T
R
T
R
T
R
T
R
T
R
T
R
T
R
T
Switch Function Description
S1-1
S1-2
S1-3
Service Level Selection Selects the service level to be provided. The BR1/10 U-BR1TE is
typically optioned for 2B+D service, but may provide other levels as
needed.
Service Option
S1-4
ON
OFF
ON
OFF
Functions dependent upon S1-5 and S1-6
LULT Mode (S1-5/6 ON)
DC Sealing Current provided
DC Sealing Current not provided
LUNT Mode (S1-5/6 OFF)
Periodic wake-up tone provided
Periodic wake-up tone not provided
Termination Mode
1. In the LULT mode, S1-4 controls sealing current. When used in an
Adjacent-to-Customer configuration, sealing current should be
provided, S1-4
ON
. In a Tandem Office Source configuration, or
adjacent to an ADTRAN U-Repeater Powering Module, sealing current
is not required, and should be disabled, S1-4
OFF
.
S1-5
S1-6
ON
OF
F
Termination Mode
LULT
LUNT
S1-5 and S1-6 must be set identically for proper operation of the BR1/
10 U-BR1TE. Must be set
ON
when unit is installed in an Adjacent-to-
Customer or Tandem Office Source configuration. Must be
OFF
when
Adjacent-to-Switch and Tandem Office Sink configurations.
S1-7
ON
OFF
Zero Byte Substitution
Enables ZBS
Disables ZBS
The ZBS option must be set the same for each U-BR1TE terminating
the T1 carrier facility. S1-7 should be
ON
for AMI-provisioned circuits.
The switch setting is optional for B8ZS-provisioned circuits. Consult
local provisioning guidelines.
2B+D
B1+D
B2+D
D
2B
B1
B2
S1-1
(B1)
ON
ON
OFF
OFF
ON
ON
OFF
S1-2
(B2)
ON
OFF
ON
OFF
ON
OFF
ON
S1-3
(D)
ON
ON
ON
ON
OFF
OFF
OFF
2. In the LUNT mode, S1-4 controls periodic wake-up tones. Periodic
wake-up tones should be disabled when located in an Adjacent-to-
Switch location, S1-4
OFF
. Periodic wake-up tones are required in a
Tandem Office Sink configuration, or when adjacent to a device that
required wake-up tones, such as Newbridge switch.
Connections
Table C shows the wiring interconnects for the 2-wire
U-Interface. All other input and output to the BR1/10
U-BR1TE are made through the backplane.
Optioning
S1 provides the option settings for the BR1/10
U-BR1TE. Figure 1 shows the location of S1. Switch
functions are explained in Table D.
Faceplate Features
The BR1/10 U-BR1TE provides a faceplate STATUS
LED, as illustrated in Figure 1. GREEN indicates
synchronization on both U and T1 interfaces. RED
indicates the lack of synchronization of one or both of the
interfaces. The LED will
flash
RED and GREEN for 3
seconds following selection of the channel unit on the
BR1/10 LIU, and then return to the current synchronization
status.
4 Section 61150077L1-5, Issue 1 61150.077L1-5B
3. TESTING
The BR1/10 U-BR1TE responds to standard embedded
operations channel (
eoc
) testing, including B1, B2 and
2B+D loopbacks. These
eoc
commands are sent from
an upstream device, such as the ISDN switch, another
U-BR1TE, or an ISDN test set. This loopback capability
allows for remote testing.
DS0 TESTING
DS0 LocalTest access allows local craftspersons to
assist in circuit turn-up or sectionalization of trouble/
equipment malfunction when remote testing is not
available or convenient.
The BR1/10 BCU and LIU provide the required network
access for testing downstream ISDN devices, inserting
a test pattern to either the carrier or loop interface,
performing a local bi-lateral loopback, and performing
local performance monitoring of the ISDN circuit.
When DS0 is selected on the BR1/10 BCU, local test
access is afforded to each of the installed BR1/10
BR1TE channel units in both the downstream and
upstream directions. Bantam jacks for DS0 logic access,
the 8 kHz and 64 kHz clock reference, the selection of
the desired channel unit (1-10) and of the desired test
are provided by the BR1/10 LIU. When the 10 position
rotary switch is used to select a BR1TE channel unit, the
Status LED on the BR1TE channel unit will alternate
flashing
RED and GREEN for approximately 3 seconds
before returning to the current status display.
Loopback Test (ADR1-ADR6, NT1)
Loopbacks in the network-to-customer direction can be
initiated from either the ISDN switch or the BR1/10 LIU.
The downstream direction is automatically selected based
on the card position in the network. To initiate a loopback,
perform the following:
1. Insert the TX and RX Bantam plugs of the DS0
digital test set into the Bantam jack of the LIU.
Connect the clock input to the DS0 digital test set
DB-9 connector on the LIU. Configure the test set
for Near Logic and 64 kbps.
2. Select the desired BR1TE channel unit using the
DSL rotary switch on the LIU. The selected BR1TE
channel card STATUS LED will
flash
GREEN and
RED for approximately 3 seconds when selected.
3. Select the desired loopback address on the LIU
(ADR1-ADR6, or NT1).
4. Select the desired bearer channel using B1/B2 DIP
switch on the BCU.
5. Depress the BCU’s recessed TEST push-button to
initiate the loopback test. The DS0-LB status LED
will light YELLOW when the loopback is established
to the selected address. If the selected address does
not respond, the DS0-LB LED will remain out. Observe
the DS0 digital set for bit errors.
6. Tests to the other B channel or additional network
ISDN devices may be performed by changing to
another test (steps 3 and 4). It is not necessary to
exit the test mode to select a new test. If a new
BR1TE channel unit is selected, all DS0 tests will be
terminated.
7. To terminate the loopback, depress the TEST push-
button, or remove the transmit Bantam plug. Upon
deactivation of the test, the DS0-LB LED will go out.
Point-to-Point Test, (CRTX, LPTX)
A point-to-point (straightaway) test can be performed to
either the U-interface (LPTX) or the T1 carrier interface
(CRTX).
To initiate a point-to-point test using a DS0 digital test
set, perform the following:
1. Insert the TX and RX Bantam plugs of the DS0
digital test set into the Bantam jack on the LIU.
Connect the clock input to the DS0 digital test set
DB-9 connector on the LIU. Configure the test set
for Near Logic and 64 kbps.
2. Select the desired BR1TE channel unit using the
DSL rotary switch on the LIU. The selected BR1TE
channel card STATUS LED will
flash
GREEN and
RED for approximately 3 seconds when selected.
3. Select the desired test direction, LPTX or CRTX, on
the LIU.
4. Select the desired bearer channel using B1/B2 DIP
switch on the BCU.
5. Depress the recessed TEST push-button on the
BCU to initiate the test.
6. If the far end unit is a BR1/10 BR1TE channel unit,
perform Steps 1 through 4, choosing the same
faceplate switch setting. Ensure both test sets are
configured for the same test pattern (511, 2047).
7. Observe the DS0 digital test set for bit errors.
8. To deactivate the loopback, depress the TEST
push-button, or remove the transmit Bantam plug.
Upon deactivation of the test, the DS0-LB LED will
go out.
5Section 61150077L1-5, Issue 161150.077L1-5B
Local Loopback (LPBK)
A bilateral loopback can be initiated for any of the BR1/
10 BR1TE channel units for either bearer channel.
Since a local test pattern source is not required for this
test, it can be performed without additional test equipment.
To initiate a local loopback, perform the following:
1. Select the desired BR1TE channel unit using the
DSL rotary switch on the LIU. The selected BR1TE
channel card STATUS LED will
flash
GREEN and
RED for approximately 3 seconds when selected.
2. Select the LPBK using the ten-position rotary switch.
3. Select the desired bearer channel using B1/B2 DIP
switch on the BCU.
4. Depress the recessed TEST push-button to initiate
the test. The DS0-LB LED will
flash
once per second
for a B1 loopback; twice per second for a B2 loopback.
5. To deactivate the loopback, depress the TEST
push-button. Upon deactivation of the test, the
DS0-LB LED will go out.
Local Performance Monitoring
Performance monitoring of the local T1 carrier system
and the 2-wire U-interface of the ISDN data can be
performed from the front panel without interruption of
service to the customer. For this test, bearer channel
selection is not applicable and a test pattern source is
not required. To initiate a local performance monitoring,
perform the following:
1. Ensure a Bantam plug is NOT installed in the
faceplate TX Bantam jack on the BR1/10 LIU.
2. Select the desired BR1TE channel unit using the
DSL rotary switch on the LIU. The selected BR1TE
channel card STATUS LED will
flash
GREEN and
RED for approximately 3 seconds when selected.
3. Select ADR1 on the LIU.
4. Depress the recessed TEST Push-button to initiate
the test.
5. The total number of
crc
errors are simultaneously
displayed by the LP and CR CRC status LEDs.
LEDs will
flash
for 6-19
crc
s, will illuminate solid
when >20 errors.
6. To exit Local Performance monitoring, depress
the TEST push-button.
4. SPECIFICATIONS
The specifications for the BR1/10 U-BR1TE are listed in
Table E.
5. MAINTENANCE
The BR1/10 U-BR1TE requires no routine maintenance
to operate properly.
ADTRAN does not recommend that repairs be performed
in the field. Repair services are obtained by returning
the defective unit to ADTRAN’s Customer Service.
6. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within ten
years from the date of shipment if it does not meet its
published specifications or fails while in service (see
ADTRAN Equipment Warranty, Repair, and Return Policy
and Procedure).
Return Material Authorization (RMA) is required prior to
returning equipment to ADTRAN.
For service, RMA requests, or further information, contact
one of the following numbers:
ADTRAN Technical Support............. (800) 726-8663
Standard support hours, Monday-Friday, 7am-7pm CST
Emergency Support, 7 days/week, 24 hours/day
ADTRAN Sales................................... (800) 827-0807
ADTRAN Repair/RMA........................ (800) 963-8722
Repair and Return Address:
ADTRAN, Inc.
Customer Service Department
901 Explorer Boulevard
Huntsville, Alabama 35806-2807
6 Section 61150077L1-5, Issue 1 61150.077L1-5B
Table E. BR1/10 U-BR1TE Specifications
Line:
Operating Mode:
Data Rate:
Signal Format:
2-wire (tip and ring)
Full-duplex
160 kbps total; 144 kbps available to customer
2B1Q
Output Amplitude
Tx Source Impedence:
Rx Source Impedence:
Receiver Sensitivity:
BR1/10 compatible equipment:
2.5V Zero-to-peak
According to ANSI T1.601.1992
According to ANSI T1.601.1992
According to ANSI T1.601.1992
Size:
Weight:
Mounting:
2 1/2" High, 9 3/8" Deep, 5/8" Wide
10 oz
Mounts in ADTRAN BR1/10
Channel Banks
-48v
5 V
Current Drain
20 mA
5 mA
On-Card Dissipation
(in LUNT mode), 75 mW (or 3/4 Watt)
Normal Operating Mode
Temperature: Operating
Storage
Relative Humidity: up to 95%, non-condensing
-40° C to +70° C
-40° C to +85° C
Interface:
Status:
ISDN and other digital service,
according to TR-NWT-000397.
3 DS0 method, ADTRAN 4:1 TDM delivery of
2B+D Basic Rate ISDN
Indicated Sync. Status of Loop
and Carrier Interface
Loop Interface
DS1 Facility Interface
Network Compatibility
Faceplate Indicator
Mechanical
Power
Environmental
-
1
-
2
-
3
-
4
-
5
-
6
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